Transformation of the herbicide ( sup 14 C)glufosinate in soils

Journal Article · · Journal of Agricultural and Food Chemistry; (USA)

OSTI ID:7025756

Smith, A E ^[1]

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1. Agriculture Canada Research Station, Regina, Saskatchewan (Canada)

The degradation of 2 {mu}g/g ({sup 14}C)glufosinate (DL-homoalan-4-ylmethylphosphinic acid) was studied in clay, clay loam, and sandy loam soils at 85% field capacity and at 20{degree}C. Over a 4-week period the soils were extracted and analyzed for transformation products by radiochemical and gas chromatographic techniques. In all soils there was release of ({sup 14}C)carbon dioxide and formation of ({sup 14}C)-3-(hydroxymethylphosphinyl)propionic acid (MPPA) as major degradation products. Within 21 days, about 55% of the applied {sup 14}C herbicide had been transformed to MPPA in the sandy loam and 19% to ({sup 14}C)carbon dioxide. After 28 days, approximately 45% of the {sup 14}C herbicide had been transformed to MPPA in the clay and clay loam and 10% released as ({sup 14}C)carbon dioxide. At all samplings, other {sup 14}C transformation products appeared to be insignificant.

• OSTI ID: 7025756
• Journal Information: Journal of Agricultural and Food Chemistry; (USA), Journal Name: Journal of Agricultural and Food Chemistry; (USA) Vol. 37:1; ISSN JAFCA; ISSN 0021-8561
• Country of Publication: United States
• Language: English

Related Subjects

553002* -- Agriculture & Food Technology-- Horticulture-- (1987-)
60 APPLIED LIFE SCIENCES
BIODEGRADATION
CARBON 14 COMPOUNDS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
DECOMPOSITION
GAS CHROMATOGRAPHY
HERBICIDES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
METABOLISM
METABOLITES
PESTICIDES
QUANTITATIVE CHEMICAL ANALYSIS
RADIOCHEMICAL ANALYSIS
SEPARATION PROCESSES
SOILS
TRACER TECHNIQUES